Method of and apparatus for electric welding



Feb. 9 1926.

r2 MATTICE METHOD OF AND APPARATUS FOR ELECTRIC WELDING Filed Oc t. 17, 1924 stricted to the welding of pipes,

- fers also to tubular trode in position.

Showing a p Patented Feb. 9, 1926. v

UNITED STATES ROYAL MATTICE, 0F BETHLEHEM, PENNSYLVANIA.

METHGD OF AND APPARATUS FOR ELECTRIC WELDING. Y a

Application filed October 1 concern:

Be it known that I, ROYAL .Ma'r'rrcn, a citizen of the United States, residing at Bethlehem, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Methods of and Apparatus for Electric Welding, of which the following is a specification.

lhis invention relates to a method. or and apparatus for electric welding.

It is the primary object of this invention to provide a method of welding tubular metallic structures such as pipes or the like to forrn a unitary structure;

It is a further object of this invention provide a method of welding together,

tructures such as metallic end to end, two s ipes or the like.- A still' further object of this invention is to provide a method of welding the ends got two pipes or the liketogether simultaneously throughout the entire circumference of the ends.

Another object of this invention is to provide a method of repairing a cracked or bi? ken pipe or the like by electric welding. v afsnu further object at this invention is to p ovide an electrode holder which wilhplrhfitthe entire circumference of a cracked or hoigen pipe to be welded simultaneously or which wili-pemnit the simultaneous welding of tlieegtltire c'ircum fr'c'nc'eoti h like to the entire one end of a pipe or d oi another pipe circumference of the en or the like.

Other objects and advantages ofi this invention will be apparent from the follow; ing description, taken in conjunction with the accompanying drawings. I desire it understood that this invention is not reand that wherever the word pipes appears, it rearticles generally.

In the drawings: Figure 1 is a si section with the electro de elevation, partly in de holder and elec- Fig. 2 is a view on the line 2--2, Fig. .1 and Fig. 3 is a view on the line 3-3 of Fig. 2 lurality of electrodes.

more particularly, to the Referring now,

7, 1924. Serial in. 744,167.

drawings 1 indicates a pipe or othertubular article which has been broken at 2 into sections A and B. In this instance the break is substantiallya regular one there'fore the method and apparatus of the present invention is applicable.

In repairing this break or crack, 2, I provide an electrode holder of appropriate size, the same comprising a clamp having arcuate shaped jaws 3 and 4, hingedly secured together at their lower ends; lugs 5 depending from each of the jaws and carrying pin 6, providing the hinge. Befltween lugs 5 is a spacer 7, for an obvious purpose.

Secured to the upper end of'jaw 3 is a lug 8 to which is pivotally secured a link 9 whichis adapted to engage in a slot 10 in a lug 11 carried on the upper end of jaw 4. The outer face 12 of lug 11 is preferably, substantially arcuate in shape to provide a bearing face for a cam surface 13- formed at the. foot of a hand lever 1 1 which is pivotaliysecured to the free end of link 9 as shown at 15. the end (not shown) of lever 14 ispreifer thedevice symmetrical, the outer face 16 of lug 8 is also arcuate shaped corresponding to face 12 of lug 11.

To each of jaws 3 a ing post 17 either of which is adapted to receive a lead from a source of electricity.

"*" Th'e'Tnner face of each jaw aud t is recessed as shown at 18," adapted to receive, an electrode 19 which may be a single fiat strip as shown-in Fig. 1 or may be plurality of strips 20 as shown in Fig. 3.- Llhe strip or the recess 18 with the jaws 3 and 4: in open position, andthe clamp or electrode holder is then placed around the pipe 1 with the electrode 19 in contact with the pipe 1, and 'over the crack or break 2. This encircling of the pipe by the electrode and electrode holder is, of course, accomplished by closing the jaws 3 and 4', thus bending the electrode, the jaws assuming the position shown in Fig. 2. The link 9 is then dropped into the slot 10 and the handle 14 and link 9 assume the position shown in Fig. 2. I

Referring to Fig. 3 wherein is shown what is known as a scarf we d, it will be ably insulated. To make nd 4 is secured a bindand this rccesss is' electrode 19 is inserted in 2 emma seen that a plurality of electrodes 20 are held within the recess 18.

It will also be seen that with the elements assembled as above described andas shown in Fig. 2, the upper ends of the jaws 3 and 4 are spaced from each other as shown at 21. The lower end of each of jaws 3 and a is tapered for an obvious reason.

In use, the pipe AB is used the negative element and the clamp itself is used as the ositive element, or if desired the pipe may be positive and the clamp may be negative.

- also give complete satisfaction.

As electrodes or welding material, I preferably use phosphor-bronze as this has been found entirely satisfactory in use, but I am not restricted to the use of phosphor-bronze. as, obviously; other welding material might The electrode holder may be formed of iron, steel. hronze'or copper, or other suitable material depending on the character" of the article being welded andihe material of which it is formed. Of course it is necessary' that the clamp be'formed of material such that in operation the welding material will not become united with the clamp, or welded thereto.

With the holder assembled as shown in the drawings, and the bindin posts connected to a suitablesource. electricity. the electric current is turned org-and it will be apparent that the phosphor-bronze welding material or electrode, whether of the type shown in Figures 1 or 3, will be heated.

The heating is continued until the electrode reaches the fusion point. at which time the handle 14 is depressed the jaws .3 and 4 being forced together because of the engagement of cam surface 13 with face 12 of ug 11, and the electrode now at the fusion point is positively pressed or' forced into the pores'or' the pipe at the weld or also, referring now to Fig. 3 into the space 22, if a scarf weld-is being effected. At this time the electric current is turned 05 and the weld allowed to cool.

If a scarf or butt weld is being effected, this squeezing of the welding material compensates for any irregularities present in the pipe at the juncture of the sections thereof, which sections are being welded tqgether.

It is believed that the invention will .be

i fully apparent to those skilled in the art,

but I desire it understood that various changes in the form and proportions of the device shown may be made within the scope of the appended claimswithout departing from the spirit of the invention.

What I claim and desire tosecure by Letters Patent is:

' Hfihe method of repairing circumferem tiall'y cracked or broken tubular structures which comprises covering the crack or break with welding material, heating the welding material, and then compressing the welding material entirely around the tubular structure at one operation until a pn t at least, enters the pores of the tubular st; ucture.

The method of repairing cracked or broken tubular structures which comprises covering the crack or break with welding material, heating the welding material to the fusion point and llllftlljv compressing the weldimg material entirely around the tubular structure at one operation until a part at least is forced into the pores of the tubular structure.

The method or electric weldin which comprises clamping welding materia around the article at the place of weld, heating the welding material to the fusion point and then compressing the welding material to force the same into the pores of the article to be welded. L

4. The method of electric welding which comprises clamping voiding material around the article at the p ice ofweld, heating the welding material to the fusion point and then compressing the welding material whereby to form a unitar structure of the article welded and the welding material at the place of weld. I

5. An article of thekind described comprising a clamp having a recent for receivmg welding material and adapted to compreisls the welding material at the place of 'e l 6. A holder for welding material comprising a clamp having arcane shaped jaws, said jaws being provided with complementaryrecesses for receivin weldin material and being adapted. to he force towards each other to compress the welding material at the place of weld.

7. A holder for weldin material comprising oppositely arranger arcuate shaped jaws having complementary recesses for re ceiving weldin material, a connecting said jaws at the lower ends thereof, and a cam lever connected to the jaws at the upper ends thereof for forcing the jaws toward each other to compress the welding material.

8. A. holder for weldin materild'flompris- -ing oppositely arranged jaws baring complementary recesses for receiving welding material, and means for forcing said jaws toward each other to force'the welding material into the article being welded into the place of weld.

9. A holder for welding material comprising oppositely arranged arcuate shaped jaws having complementary recesses for receiving welding materiaha hinge connecting said jaws at the lower ends thereof, and a. cam lever connected to thejaws at the upper ends thereof for forcing the jaws toward each other to compress said welding material, and a binding'post secured to each of said f'aws.

10. The method of electrically we ding .Which camjpxiwa covering; the abut'iziing l lficfsric We'iflig apparaiuii Q-OH pI'iS ing a clamp having a recess f0 receiving Welding material, said. sawing 21%, an aiectrefi".

clamp in testimony whereof Ii my Sig-1.132111%.

in MLTTICE. 

